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Author Topic: 60mph @ 6k RPM?  (Read 1075 times)

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Offline Coredozer19

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60mph @ 6k RPM?
« on: June 01, 2018, 08:00:26 AM »
1973 Honda CB350F 60mph @ 6k rpms. Does that sound right? And what toothed sprocket would I have to go in the rear to lower the rpms in 5th gear. I don’t want the bike screaming when I’m only doing 45-55 mph
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1973 Honda CB350F

Offline flybox1

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Re: 60mph @ 6k RPM?
« Reply #1 on: June 01, 2018, 08:19:02 AM »
Screaming?!?!  That sounds perfect.  Right in the powerband ;D
I wouldnt change a thing  8)

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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline cb_n00b

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Re: 60mph @ 6k RPM?
« Reply #2 on: June 01, 2018, 08:36:44 AM »
These bikes were built to run that way....You're doing absolutely no hard running it at those RPMs on the highway.

My CB550 sits around 6,000-6,500 between at 70mph and I've cruised at that for very long periods of time. The engines purr after doing it, it really lets them run good for a while; much better than stop and go.
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1977 CB550K
- MotoGP Werks Exhaust / Stock Airbox
- Dyna S Ignition & Coils
- Motogadget M-Unit Blue
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Offline poofdog

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Re: 60mph @ 6k RPM?
« Reply #3 on: June 01, 2018, 02:20:11 PM »
The sweet spot on these bikes starts at 5k and stops at the top. There is zip for torque, so you need the rpms just to maintain speed on any kind of incline, even at speed.  Thats what is neat about them.  Even the reviews from back in the day say the same thing.  Thats how they are made. :)
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73 CB350F
05 Sportster 883(wifes)
09 Sportster 883
78 Suzuki GS750E
97 Corvette

Offline DaveBarbier

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Re: 60mph @ 6k RPM?
« Reply #4 on: June 01, 2018, 04:48:30 PM »
The owners manual says to never go beyond the red area on the tach and to not to stay in the red area for too long. That means it’s totally acceptable to kiss the redline often. I too hangout around the 6500-7500rpm area.
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Offline BomberMann650

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Re: 60mph @ 6k RPM?
« Reply #5 on: June 03, 2018, 08:02:23 AM »
Whats a Tachometer?  Haha
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Offline cb_n00b

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Re: 60mph @ 6k RPM?
« Reply #6 on: June 04, 2018, 01:38:33 PM »
So correction to my above post - I was on the freeway today and my CB550 sits around ~5,200 at 70 mph, I'm closer to 6,000 rpm at 80 mph....Just thought I'd clarify that in case other folks read this in the future.

Either way, point stays the same - the bikes are just fine (and happy) riding along at those RPMs, and 6K for a 350 sounds about right.
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1977 CB550K
- MotoGP Werks Exhaust / Stock Airbox
- Dyna S Ignition & Coils
- Motogadget M-Unit Blue
- 069A CB550F Carbs
- Beringer front brake kit

Offline carnivorous chicken

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Re: 60mph @ 6k RPM?
« Reply #7 on: June 04, 2018, 01:41:06 PM »
6k at 60mph is right, in my experience. I rode at 70-75 and up to about 8k on the freeway in PHX -- plenty of room before hitting the redline, and in the higher rpms that these bikes like. If you do a lot of city or stop and go riding, best to keep the revs up too. And I rode in Phoenix year round, including 100+ degree heat without overheating problems (just keep moving...).
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Offline Coredozer19

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Re: 60mph @ 6k RPM?
« Reply #8 on: June 04, 2018, 04:11:48 PM »
Update since original post.

I am now getting used to the higher rpms at higher speeds. And I’m liking it  8)

Forgot to mention this is my first bike so I am still a bit timid.
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1973 Honda CB350F

Offline DaveBarbier

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Re: 60mph @ 6k RPM?
« Reply #9 on: June 04, 2018, 04:32:58 PM »
In CT it’s mandatory to go through a motorcycle safety course. Helped me a lot in getting comfortable on the bike. Not sure what the laws are in PA but if you haven’t gone through a MSC then I highly recommend it.
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